For system ventilation the valve should be mounted at the system's highest point.

对于系统通风阀应安装在系统的最高点。

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Ventilation system remains.

通风系统残骸。

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We did consider a heat recovery ventilation system, a box and pipes that bring in fresh air.

我们的确曾经考虑过热回收通风系统，用一个机箱和一些管道引入新鲜空气。

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Experience shows us that transmission becomes widespread within the passenger cabin involving all sections when the ventilation system is not working -- as evidenced by an influenza outbreak in 1979 involving passengers being kept aboard grounded aircraft with an inoperative ventilation system.

CNN: Commentary: Flu and your health on a plane

One example: In 2005 OnStar detected and fixed a problem in the electronic ventilation system in GM's 2006 full-size SUVs.

FORBES: Magazine Article

She believed the solar-paneled roof would power the entire car, not just the ventilation system, as is actually the case.

FORBES: Solar-Powered Cars? Clean Energy Hype Needs a Sober Dose Of Reality